16501849808 has 20 divisors (see below), whose sum is σ = 32496472548. Its totient is φ = 8115663360.

The previous prime is 16501849769. The next prime is 16501849829. The reversal of 16501849808 is 80894810561.

It can be written as a sum of positive squares in 2 ways, for example, as 5217461824 + 11284387984 = 72232^2 + 106228^2 .

It is a super-2 number, since 2×16501849808² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8452841 + ... + 8454792.

Almost surely, 2^16501849808 is an apocalyptic number.

It is an amenable number.

16501849808 is a deficient number, since it is larger than the sum of its proper divisors (15994622740).

16501849808 is a wasteful number, since it uses less digits than its factorization.

16501849808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16907702 (or 16907696 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 50.

The spelling of 16501849808 in words is "sixteen billion, five hundred one million, eight hundred forty-nine thousand, eight hundred eight".